Annotation of mandoc/html.c, Revision 1.200
1.200 ! schwarze 1: /* $Id: html.c,v 1.199 2017/01/19 16:59:30 schwarze Exp $ */
1.1 kristaps 2: /*
1.176 schwarze 3: * Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
1.194 schwarze 4: * Copyright (c) 2011-2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 5: *
6: * Permission to use, copy, modify, and distribute this software for any
1.29 kristaps 7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
1.1 kristaps 9: *
1.186 schwarze 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.29 kristaps 11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.186 schwarze 12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.29 kristaps 13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 kristaps 17: */
1.92 kristaps 18: #include "config.h"
19:
1.41 kristaps 20: #include <sys/types.h>
1.30 kristaps 21:
1.1 kristaps 22: #include <assert.h>
1.68 kristaps 23: #include <ctype.h>
1.76 kristaps 24: #include <stdarg.h>
1.29 kristaps 25: #include <stdio.h>
1.63 kristaps 26: #include <stdint.h>
1.1 kristaps 27: #include <stdlib.h>
1.33 kristaps 28: #include <string.h>
1.45 kristaps 29: #include <unistd.h>
1.1 kristaps 30:
1.100 kristaps 31: #include "mandoc.h"
1.155 schwarze 32: #include "mandoc_aux.h"
1.58 kristaps 33: #include "out.h"
1.51 kristaps 34: #include "html.h"
1.186 schwarze 35: #include "manconf.h"
1.64 kristaps 36: #include "main.h"
1.63 kristaps 37:
1.29 kristaps 38: struct htmldata {
1.63 kristaps 39: const char *name;
1.29 kristaps 40: int flags;
1.196 schwarze 41: #define HTML_NOSTACK (1 << 0)
42: #define HTML_AUTOCLOSE (1 << 1)
43: #define HTML_NLBEFORE (1 << 2)
44: #define HTML_NLBEGIN (1 << 3)
45: #define HTML_NLEND (1 << 4)
46: #define HTML_NLAFTER (1 << 5)
47: #define HTML_NLAROUND (HTML_NLBEFORE | HTML_NLAFTER)
48: #define HTML_NLINSIDE (HTML_NLBEGIN | HTML_NLEND)
49: #define HTML_NLALL (HTML_NLAROUND | HTML_NLINSIDE)
50: #define HTML_INDENT (1 << 6)
51: #define HTML_NOINDENT (1 << 7)
1.29 kristaps 52: };
1.7 kristaps 53:
1.29 kristaps 54: static const struct htmldata htmltags[TAG_MAX] = {
1.196 schwarze 55: {"html", HTML_NLALL},
56: {"head", HTML_NLALL | HTML_INDENT},
57: {"body", HTML_NLALL},
58: {"meta", HTML_NOSTACK | HTML_AUTOCLOSE | HTML_NLALL},
59: {"title", HTML_NLAROUND},
60: {"div", HTML_NLAROUND},
61: {"h1", HTML_NLAROUND},
62: {"h2", HTML_NLAROUND},
63: {"span", 0},
64: {"link", HTML_NOSTACK | HTML_AUTOCLOSE | HTML_NLALL},
65: {"br", HTML_NOSTACK | HTML_AUTOCLOSE | HTML_NLALL},
66: {"a", 0},
67: {"table", HTML_NLALL | HTML_INDENT},
68: {"tbody", HTML_NLALL | HTML_INDENT},
69: {"col", HTML_NOSTACK | HTML_AUTOCLOSE | HTML_NLALL},
70: {"tr", HTML_NLALL | HTML_INDENT},
71: {"td", HTML_NLAROUND},
72: {"li", HTML_NLAROUND | HTML_INDENT},
73: {"ul", HTML_NLALL | HTML_INDENT},
74: {"ol", HTML_NLALL | HTML_INDENT},
75: {"dl", HTML_NLALL | HTML_INDENT},
76: {"dt", HTML_NLAROUND},
77: {"dd", HTML_NLAROUND | HTML_INDENT},
78: {"pre", HTML_NLALL | HTML_NOINDENT},
79: {"b", 0},
80: {"i", 0},
81: {"code", 0},
82: {"small", 0},
83: {"style", HTML_NLALL | HTML_INDENT},
84: {"math", HTML_NLALL | HTML_INDENT},
85: {"mrow", 0},
86: {"mi", 0},
87: {"mo", 0},
88: {"msup", 0},
89: {"msub", 0},
90: {"msubsup", 0},
91: {"mfrac", 0},
92: {"msqrt", 0},
93: {"mfenced", 0},
94: {"mtable", 0},
95: {"mtr", 0},
96: {"mtd", 0},
97: {"munderover", 0},
98: {"munder", 0},
99: {"mover", 0},
1.90 kristaps 100: };
101:
1.140 kristaps 102: static const char *const roffscales[SCALE_MAX] = {
103: "cm", /* SCALE_CM */
104: "in", /* SCALE_IN */
105: "pc", /* SCALE_PC */
106: "pt", /* SCALE_PT */
107: "em", /* SCALE_EM */
108: "em", /* SCALE_MM */
109: "ex", /* SCALE_EN */
110: "ex", /* SCALE_BU */
111: "em", /* SCALE_VS */
112: "ex", /* SCALE_FS */
113: };
114:
1.194 schwarze 115: static void a2width(const char *, struct roffsu *);
1.197 schwarze 116: static void print_byte(struct html *, char);
117: static void print_endline(struct html *);
118: static void print_endword(struct html *);
119: static void print_indent(struct html *);
120: static void print_word(struct html *, const char *);
121:
1.184 schwarze 122: static void print_ctag(struct html *, struct tag *);
1.197 schwarze 123: static int print_escape(struct html *, char);
1.195 schwarze 124: static int print_encode(struct html *, const char *, const char *, int);
125: static void print_href(struct html *, const char *, const char *, int);
1.141 kristaps 126: static void print_metaf(struct html *, enum mandoc_esc);
1.82 kristaps 127:
1.156 schwarze 128:
1.180 schwarze 129: void *
1.191 schwarze 130: html_alloc(const struct manoutput *outopts)
1.10 kristaps 131: {
1.30 kristaps 132: struct html *h;
133:
1.128 kristaps 134: h = mandoc_calloc(1, sizeof(struct html));
1.10 kristaps 135:
1.66 kristaps 136: h->tags.head = NULL;
1.186 schwarze 137: h->style = outopts->style;
138: h->base_man = outopts->man;
139: h->base_includes = outopts->includes;
140: if (outopts->fragment)
141: h->oflags |= HTML_FRAGMENT;
1.43 kristaps 142:
1.188 schwarze 143: return h;
1.29 kristaps 144: }
1.10 kristaps 145:
1.29 kristaps 146: void
147: html_free(void *p)
148: {
1.30 kristaps 149: struct tag *tag;
150: struct html *h;
151:
152: h = (struct html *)p;
1.37 kristaps 153:
1.66 kristaps 154: while ((tag = h->tags.head) != NULL) {
1.156 schwarze 155: h->tags.head = tag->next;
1.30 kristaps 156: free(tag);
157: }
1.53 kristaps 158:
1.30 kristaps 159: free(h);
1.10 kristaps 160: }
1.2 kristaps 161:
1.51 kristaps 162: void
1.29 kristaps 163: print_gen_head(struct html *h)
164: {
1.165 kristaps 165: struct tag *t;
1.41 kristaps 166:
1.194 schwarze 167: print_otag(h, TAG_META, "?", "charset", "utf-8");
1.165 kristaps 168:
1.168 kristaps 169: /*
170: * Print a default style-sheet.
171: */
1.196 schwarze 172:
1.194 schwarze 173: t = print_otag(h, TAG_STYLE, "");
1.196 schwarze 174: print_text(h, "table.head, table.foot { width: 100%; }");
1.197 schwarze 175: print_endline(h);
1.196 schwarze 176: print_text(h, "td.head-rtitle, td.foot-os { text-align: right; }");
1.197 schwarze 177: print_endline(h);
1.196 schwarze 178: print_text(h, "td.head-vol { text-align: center; }");
1.197 schwarze 179: print_endline(h);
1.198 schwarze 180: print_text(h, "div.Pp { margin: 1ex 0ex; }");
1.165 kristaps 181: print_tagq(h, t);
1.41 kristaps 182:
1.194 schwarze 183: if (h->style)
184: print_otag(h, TAG_LINK, "?h??", "rel", "stylesheet",
185: h->style, "type", "text/css", "media", "all");
1.4 kristaps 186: }
187:
1.126 schwarze 188: static void
1.132 kristaps 189: print_metaf(struct html *h, enum mandoc_esc deco)
1.88 kristaps 190: {
1.90 kristaps 191: enum htmlfont font;
1.88 kristaps 192:
193: switch (deco) {
1.156 schwarze 194: case ESCAPE_FONTPREV:
1.90 kristaps 195: font = h->metal;
1.88 kristaps 196: break;
1.156 schwarze 197: case ESCAPE_FONTITALIC:
1.90 kristaps 198: font = HTMLFONT_ITALIC;
199: break;
1.156 schwarze 200: case ESCAPE_FONTBOLD:
1.90 kristaps 201: font = HTMLFONT_BOLD;
1.88 kristaps 202: break;
1.156 schwarze 203: case ESCAPE_FONTBI:
1.152 schwarze 204: font = HTMLFONT_BI;
205: break;
1.156 schwarze 206: case ESCAPE_FONT:
207: case ESCAPE_FONTROMAN:
1.90 kristaps 208: font = HTMLFONT_NONE;
1.88 kristaps 209: break;
210: default:
211: abort();
212: }
213:
1.122 kristaps 214: if (h->metaf) {
215: print_tagq(h, h->metaf);
216: h->metaf = NULL;
217: }
218:
219: h->metal = h->metac;
220: h->metac = font;
221:
1.152 schwarze 222: switch (font) {
1.156 schwarze 223: case HTMLFONT_ITALIC:
1.194 schwarze 224: h->metaf = print_otag(h, TAG_I, "");
1.152 schwarze 225: break;
1.156 schwarze 226: case HTMLFONT_BOLD:
1.194 schwarze 227: h->metaf = print_otag(h, TAG_B, "");
1.152 schwarze 228: break;
1.156 schwarze 229: case HTMLFONT_BI:
1.194 schwarze 230: h->metaf = print_otag(h, TAG_B, "");
231: print_otag(h, TAG_I, "");
1.152 schwarze 232: break;
233: default:
234: break;
235: }
1.88 kristaps 236: }
237:
1.138 kristaps 238: int
239: html_strlen(const char *cp)
240: {
1.151 schwarze 241: size_t rsz;
242: int skip, sz;
1.138 kristaps 243:
244: /*
245: * Account for escaped sequences within string length
246: * calculations. This follows the logic in term_strlen() as we
247: * must calculate the width of produced strings.
248: * Assume that characters are always width of "1". This is
249: * hacky, but it gets the job done for approximation of widths.
250: */
251:
252: sz = 0;
1.151 schwarze 253: skip = 0;
254: while (1) {
255: rsz = strcspn(cp, "\\");
256: if (rsz) {
257: cp += rsz;
258: if (skip) {
259: skip = 0;
260: rsz--;
261: }
262: sz += rsz;
263: }
264: if ('\0' == *cp)
265: break;
266: cp++;
267: switch (mandoc_escape(&cp, NULL, NULL)) {
1.156 schwarze 268: case ESCAPE_ERROR:
1.188 schwarze 269: return sz;
1.156 schwarze 270: case ESCAPE_UNICODE:
271: case ESCAPE_NUMBERED:
272: case ESCAPE_SPECIAL:
1.185 schwarze 273: case ESCAPE_OVERSTRIKE:
1.151 schwarze 274: if (skip)
275: skip = 0;
276: else
277: sz++;
278: break;
1.156 schwarze 279: case ESCAPE_SKIPCHAR:
1.151 schwarze 280: skip = 1;
1.138 kristaps 281: break;
282: default:
283: break;
284: }
285: }
1.188 schwarze 286: return sz;
1.138 kristaps 287: }
1.88 kristaps 288:
1.85 kristaps 289: static int
1.197 schwarze 290: print_escape(struct html *h, char c)
1.159 schwarze 291: {
292:
293: switch (c) {
294: case '<':
1.197 schwarze 295: print_word(h, "<");
1.159 schwarze 296: break;
297: case '>':
1.197 schwarze 298: print_word(h, ">");
1.159 schwarze 299: break;
300: case '&':
1.197 schwarze 301: print_word(h, "&");
1.159 schwarze 302: break;
303: case '"':
1.197 schwarze 304: print_word(h, """);
1.159 schwarze 305: break;
306: case ASCII_NBRSP:
1.197 schwarze 307: print_word(h, " ");
1.159 schwarze 308: break;
309: case ASCII_HYPH:
1.197 schwarze 310: print_byte(h, '-');
1.189 schwarze 311: break;
1.159 schwarze 312: case ASCII_BREAK:
313: break;
314: default:
1.188 schwarze 315: return 0;
1.159 schwarze 316: }
1.188 schwarze 317: return 1;
1.159 schwarze 318: }
319:
320: static int
1.195 schwarze 321: print_encode(struct html *h, const char *p, const char *pend, int norecurse)
1.29 kristaps 322: {
1.197 schwarze 323: char numbuf[16];
1.77 kristaps 324: size_t sz;
1.141 kristaps 325: int c, len, nospace;
1.82 kristaps 326: const char *seq;
1.132 kristaps 327: enum mandoc_esc esc;
1.158 schwarze 328: static const char rejs[9] = { '\\', '<', '>', '&', '"',
1.154 schwarze 329: ASCII_NBRSP, ASCII_HYPH, ASCII_BREAK, '\0' };
1.14 kristaps 330:
1.195 schwarze 331: if (pend == NULL)
332: pend = strchr(p, '\0');
333:
1.85 kristaps 334: nospace = 0;
335:
1.195 schwarze 336: while (p < pend) {
1.151 schwarze 337: if (HTML_SKIPCHAR & h->flags && '\\' != *p) {
338: h->flags &= ~HTML_SKIPCHAR;
339: p++;
340: continue;
341: }
342:
1.197 schwarze 343: for (sz = strcspn(p, rejs); sz-- && p < pend; p++)
344: if (*p == ' ')
345: print_endword(h);
346: else
347: print_byte(h, *p);
1.77 kristaps 348:
1.195 schwarze 349: if (p >= pend)
1.132 kristaps 350: break;
351:
1.197 schwarze 352: if (print_escape(h, *p++))
1.154 schwarze 353: continue;
1.77 kristaps 354:
1.132 kristaps 355: esc = mandoc_escape(&p, &seq, &len);
356: if (ESCAPE_ERROR == esc)
357: break;
1.82 kristaps 358:
1.132 kristaps 359: switch (esc) {
1.156 schwarze 360: case ESCAPE_FONT:
361: case ESCAPE_FONTPREV:
362: case ESCAPE_FONTBOLD:
363: case ESCAPE_FONTITALIC:
364: case ESCAPE_FONTBI:
365: case ESCAPE_FONTROMAN:
1.151 schwarze 366: if (0 == norecurse)
367: print_metaf(h, esc);
368: continue;
1.156 schwarze 369: case ESCAPE_SKIPCHAR:
1.151 schwarze 370: h->flags |= HTML_SKIPCHAR;
371: continue;
372: default:
373: break;
374: }
375:
376: if (h->flags & HTML_SKIPCHAR) {
377: h->flags &= ~HTML_SKIPCHAR;
378: continue;
379: }
380:
381: switch (esc) {
1.156 schwarze 382: case ESCAPE_UNICODE:
1.159 schwarze 383: /* Skip past "u" header. */
1.144 kristaps 384: c = mchars_num2uc(seq + 1, len - 1);
385: break;
1.156 schwarze 386: case ESCAPE_NUMBERED:
1.141 kristaps 387: c = mchars_num2char(seq, len);
1.181 schwarze 388: if (c < 0)
389: continue;
1.82 kristaps 390: break;
1.156 schwarze 391: case ESCAPE_SPECIAL:
1.191 schwarze 392: c = mchars_spec2cp(seq, len);
1.181 schwarze 393: if (c <= 0)
394: continue;
1.132 kristaps 395: break;
1.156 schwarze 396: case ESCAPE_NOSPACE:
1.132 kristaps 397: if ('\0' == *p)
398: nospace = 1;
1.179 schwarze 399: continue;
1.185 schwarze 400: case ESCAPE_OVERSTRIKE:
401: if (len == 0)
402: continue;
403: c = seq[len - 1];
404: break;
1.82 kristaps 405: default:
1.179 schwarze 406: continue;
1.82 kristaps 407: }
1.181 schwarze 408: if ((c < 0x20 && c != 0x09) ||
409: (c > 0x7E && c < 0xA0))
1.179 schwarze 410: c = 0xFFFD;
1.197 schwarze 411: if (c > 0x7E) {
412: (void)snprintf(numbuf, sizeof(numbuf), "&#%d;", c);
413: print_word(h, numbuf);
414: } else if (print_escape(h, c) == 0)
415: print_byte(h, c);
1.32 kristaps 416: }
1.85 kristaps 417:
1.188 schwarze 418: return nospace;
1.14 kristaps 419: }
420:
1.94 kristaps 421: static void
1.195 schwarze 422: print_href(struct html *h, const char *name, const char *sec, int man)
1.94 kristaps 423: {
1.195 schwarze 424: const char *p, *pp;
425:
426: pp = man ? h->base_man : h->base_includes;
427: while ((p = strchr(pp, '%')) != NULL) {
428: print_encode(h, pp, p, 1);
429: if (man && p[1] == 'S') {
430: if (sec == NULL)
1.197 schwarze 431: print_byte(h, '1');
1.195 schwarze 432: else
433: print_encode(h, sec, NULL, 1);
434: } else if ((man && p[1] == 'N') ||
435: (man == 0 && p[1] == 'I'))
436: print_encode(h, name, NULL, 1);
437: else
438: print_encode(h, p, p + 2, 1);
439: pp = p + 2;
440: }
441: if (*pp != '\0')
442: print_encode(h, pp, NULL, 1);
1.94 kristaps 443: }
444:
1.51 kristaps 445: struct tag *
1.194 schwarze 446: print_otag(struct html *h, enum htmltag tag, const char *fmt, ...)
1.14 kristaps 447: {
1.194 schwarze 448: va_list ap;
449: struct roffsu mysu, *su;
1.197 schwarze 450: char numbuf[16];
1.30 kristaps 451: struct tag *t;
1.195 schwarze 452: const char *attr;
1.194 schwarze 453: char *s;
1.195 schwarze 454: double v;
1.196 schwarze 455: int i, have_style, tflags;
456:
457: tflags = htmltags[tag].flags;
1.30 kristaps 458:
1.94 kristaps 459: /* Push this tags onto the stack of open scopes. */
460:
1.196 schwarze 461: if ((tflags & HTML_NOSTACK) == 0) {
1.128 kristaps 462: t = mandoc_malloc(sizeof(struct tag));
1.30 kristaps 463: t->tag = tag;
1.66 kristaps 464: t->next = h->tags.head;
465: h->tags.head = t;
1.30 kristaps 466: } else
467: t = NULL;
1.29 kristaps 468:
1.196 schwarze 469: if (tflags & HTML_NLBEFORE)
1.197 schwarze 470: print_endline(h);
471: if (h->col == 0)
472: print_indent(h);
1.196 schwarze 473: else if ((h->flags & HTML_NOSPACE) == 0) {
474: if (h->flags & HTML_KEEP)
1.197 schwarze 475: print_word(h, " ");
1.196 schwarze 476: else {
477: if (h->flags & HTML_PREKEEP)
478: h->flags |= HTML_KEEP;
1.197 schwarze 479: print_endword(h);
1.105 kristaps 480: }
1.196 schwarze 481: }
1.29 kristaps 482:
1.109 kristaps 483: if ( ! (h->flags & HTML_NONOSPACE))
484: h->flags &= ~HTML_NOSPACE;
1.110 kristaps 485: else
486: h->flags |= HTML_NOSPACE;
1.109 kristaps 487:
1.94 kristaps 488: /* Print out the tag name and attributes. */
489:
1.197 schwarze 490: print_byte(h, '<');
491: print_word(h, htmltags[tag].name);
1.194 schwarze 492:
493: va_start(ap, fmt);
494:
495: have_style = 0;
496: while (*fmt != '\0') {
497: if (*fmt == 's') {
1.197 schwarze 498: print_word(h, " style=\"");
1.194 schwarze 499: have_style = 1;
500: fmt++;
501: break;
502: }
503: s = va_arg(ap, char *);
504: switch (*fmt++) {
505: case 'c':
1.195 schwarze 506: attr = "class";
1.194 schwarze 507: break;
508: case 'h':
1.195 schwarze 509: attr = "href";
1.194 schwarze 510: break;
511: case 'i':
1.195 schwarze 512: attr = "id";
1.194 schwarze 513: break;
514: case '?':
1.195 schwarze 515: attr = s;
516: s = va_arg(ap, char *);
1.194 schwarze 517: break;
518: default:
519: abort();
520: }
1.197 schwarze 521: print_byte(h, ' ');
522: print_word(h, attr);
523: print_byte(h, '=');
524: print_byte(h, '"');
1.195 schwarze 525: switch (*fmt) {
526: case 'M':
527: print_href(h, s, va_arg(ap, char *), 1);
528: fmt++;
529: break;
530: case 'I':
531: print_href(h, s, NULL, 0);
532: fmt++;
533: break;
534: case 'R':
1.197 schwarze 535: print_byte(h, '#');
1.195 schwarze 536: fmt++;
537: /* FALLTHROUGH */
538: default:
539: print_encode(h, s, NULL, 1);
540: break;
541: }
1.197 schwarze 542: print_byte(h, '"');
1.194 schwarze 543: }
544:
545: /* Print out styles. */
546:
547: s = NULL;
548: su = &mysu;
549: while (*fmt != '\0') {
550:
551: /* First letter: input argument type. */
552:
553: switch (*fmt++) {
554: case 'h':
555: i = va_arg(ap, int);
556: SCALE_HS_INIT(su, i);
557: break;
558: case 's':
559: s = va_arg(ap, char *);
560: break;
561: case 'u':
562: su = va_arg(ap, struct roffsu *);
563: break;
564: case 'v':
565: i = va_arg(ap, int);
566: SCALE_VS_INIT(su, i);
567: break;
568: case 'w':
569: s = va_arg(ap, char *);
570: a2width(s, su);
571: break;
572: default:
573: abort();
574: }
575:
576: /* Second letter: style name. */
577:
578: switch (*fmt++) {
579: case 'b':
1.195 schwarze 580: attr = "margin-bottom";
1.194 schwarze 581: break;
582: case 'h':
1.195 schwarze 583: attr = "height";
1.194 schwarze 584: break;
585: case 'i':
1.195 schwarze 586: attr = "text-indent";
1.194 schwarze 587: break;
588: case 'l':
1.195 schwarze 589: attr = "margin-left";
1.194 schwarze 590: break;
591: case 't':
1.195 schwarze 592: attr = "margin-top";
1.194 schwarze 593: break;
594: case 'w':
1.195 schwarze 595: attr = "width";
1.194 schwarze 596: break;
597: case 'W':
1.195 schwarze 598: attr = "min-width";
1.194 schwarze 599: break;
600: case '?':
1.197 schwarze 601: print_word(h, s);
602: print_byte(h, ':');
603: print_byte(h, ' ');
604: print_word(h, va_arg(ap, char *));
605: print_byte(h, ';');
606: if (*fmt != '\0')
607: print_byte(h, ' ');
1.195 schwarze 608: continue;
1.194 schwarze 609: default:
610: abort();
611: }
1.195 schwarze 612: v = su->scale;
613: if (su->unit == SCALE_MM && (v /= 100.0) == 0.0)
614: v = 1.0;
615: else if (su->unit == SCALE_BU)
616: v /= 24.0;
1.197 schwarze 617: print_word(h, attr);
618: print_byte(h, ':');
619: print_byte(h, ' ');
620: (void)snprintf(numbuf, sizeof(numbuf), "%.2f", v);
621: print_word(h, numbuf);
622: print_word(h, roffscales[su->unit]);
623: print_byte(h, ';');
624: if (*fmt != '\0')
625: print_byte(h, ' ');
1.194 schwarze 626: }
627: if (have_style)
1.197 schwarze 628: print_byte(h, '"');
1.194 schwarze 629:
630: va_end(ap);
1.94 kristaps 631:
1.172 kristaps 632: /* Accommodate for "well-formed" singleton escaping. */
1.94 kristaps 633:
1.93 kristaps 634: if (HTML_AUTOCLOSE & htmltags[tag].flags)
1.197 schwarze 635: print_byte(h, '/');
1.93 kristaps 636:
1.197 schwarze 637: print_byte(h, '>');
1.14 kristaps 638:
1.196 schwarze 639: if (tflags & HTML_NLBEGIN)
1.197 schwarze 640: print_endline(h);
1.196 schwarze 641: else
642: h->flags |= HTML_NOSPACE;
1.117 kristaps 643:
1.196 schwarze 644: if (tflags & HTML_INDENT)
645: h->indent++;
646: if (tflags & HTML_NOINDENT)
647: h->noindent++;
1.117 kristaps 648:
1.188 schwarze 649: return t;
1.14 kristaps 650: }
651:
1.29 kristaps 652: static void
1.184 schwarze 653: print_ctag(struct html *h, struct tag *tag)
1.14 kristaps 654: {
1.196 schwarze 655: int tflags;
1.156 schwarze 656:
1.184 schwarze 657: /*
658: * Remember to close out and nullify the current
659: * meta-font and table, if applicable.
660: */
661: if (tag == h->metaf)
662: h->metaf = NULL;
663: if (tag == h->tblt)
664: h->tblt = NULL;
665:
1.196 schwarze 666: tflags = htmltags[tag->tag].flags;
667:
668: if (tflags & HTML_INDENT)
669: h->indent--;
670: if (tflags & HTML_NOINDENT)
671: h->noindent--;
672: if (tflags & HTML_NLEND)
1.197 schwarze 673: print_endline(h);
674: print_indent(h);
675: print_byte(h, '<');
676: print_byte(h, '/');
677: print_word(h, htmltags[tag->tag].name);
678: print_byte(h, '>');
1.196 schwarze 679: if (tflags & HTML_NLAFTER)
1.197 schwarze 680: print_endline(h);
1.184 schwarze 681:
682: h->tags.head = tag->next;
683: free(tag);
1.14 kristaps 684: }
685:
1.51 kristaps 686: void
1.93 kristaps 687: print_gen_decls(struct html *h)
1.1 kristaps 688: {
1.197 schwarze 689: print_word(h, "<!DOCTYPE html>");
690: print_endline(h);
1.1 kristaps 691: }
692:
1.51 kristaps 693: void
1.104 kristaps 694: print_text(struct html *h, const char *word)
1.1 kristaps 695: {
1.197 schwarze 696: if (h->col && (h->flags & HTML_NOSPACE) == 0) {
1.105 kristaps 697: if ( ! (HTML_KEEP & h->flags)) {
698: if (HTML_PREKEEP & h->flags)
699: h->flags |= HTML_KEEP;
1.197 schwarze 700: print_endword(h);
1.105 kristaps 701: } else
1.197 schwarze 702: print_word(h, " ");
1.105 kristaps 703: }
1.30 kristaps 704:
1.122 kristaps 705: assert(NULL == h->metaf);
1.152 schwarze 706: switch (h->metac) {
1.156 schwarze 707: case HTMLFONT_ITALIC:
1.194 schwarze 708: h->metaf = print_otag(h, TAG_I, "");
1.152 schwarze 709: break;
1.156 schwarze 710: case HTMLFONT_BOLD:
1.194 schwarze 711: h->metaf = print_otag(h, TAG_B, "");
1.152 schwarze 712: break;
1.156 schwarze 713: case HTMLFONT_BI:
1.194 schwarze 714: h->metaf = print_otag(h, TAG_B, "");
715: print_otag(h, TAG_I, "");
1.152 schwarze 716: break;
717: default:
1.197 schwarze 718: print_indent(h);
1.152 schwarze 719: break;
720: }
1.122 kristaps 721:
1.104 kristaps 722: assert(word);
1.195 schwarze 723: if ( ! print_encode(h, word, NULL, 0)) {
1.109 kristaps 724: if ( ! (h->flags & HTML_NONOSPACE))
725: h->flags &= ~HTML_NOSPACE;
1.183 schwarze 726: h->flags &= ~HTML_NONEWLINE;
1.149 kristaps 727: } else
1.183 schwarze 728: h->flags |= HTML_NOSPACE | HTML_NONEWLINE;
1.122 kristaps 729:
730: if (h->metaf) {
731: print_tagq(h, h->metaf);
732: h->metaf = NULL;
733: }
1.113 schwarze 734:
735: h->flags &= ~HTML_IGNDELIM;
1.1 kristaps 736: }
1.30 kristaps 737:
1.51 kristaps 738: void
1.30 kristaps 739: print_tagq(struct html *h, const struct tag *until)
740: {
741: struct tag *tag;
742:
1.66 kristaps 743: while ((tag = h->tags.head) != NULL) {
1.184 schwarze 744: print_ctag(h, tag);
1.30 kristaps 745: if (until && tag == until)
746: return;
747: }
748: }
749:
1.51 kristaps 750: void
1.30 kristaps 751: print_stagq(struct html *h, const struct tag *suntil)
752: {
753: struct tag *tag;
754:
1.66 kristaps 755: while ((tag = h->tags.head) != NULL) {
1.30 kristaps 756: if (suntil && tag == suntil)
757: return;
1.184 schwarze 758: print_ctag(h, tag);
1.30 kristaps 759: }
760: }
1.171 kristaps 761:
762: void
763: print_paragraph(struct html *h)
764: {
765: struct tag *t;
766:
1.198 schwarze 767: t = print_otag(h, TAG_DIV, "c", "Pp");
1.171 kristaps 768: print_tagq(h, t);
769: }
770:
1.197 schwarze 771:
772: /***********************************************************************
773: * Low level output functions.
774: * They implement line breaking using a short static buffer.
775: ***********************************************************************/
776:
777: /*
778: * Buffer one HTML output byte.
779: * If the buffer is full, flush and deactivate it and start a new line.
780: * If the buffer is inactive, print directly.
781: */
782: static void
783: print_byte(struct html *h, char c)
784: {
785: if ((h->flags & HTML_BUFFER) == 0) {
786: putchar(c);
787: h->col++;
788: return;
789: }
790:
791: if (h->col + h->bufcol < sizeof(h->buf)) {
792: h->buf[h->bufcol++] = c;
793: return;
794: }
795:
796: putchar('\n');
797: h->col = 0;
798: print_indent(h);
799: putchar(' ');
800: putchar(' ');
801: fwrite(h->buf, h->bufcol, 1, stdout);
802: putchar(c);
803: h->col = (h->indent + 1) * 2 + h->bufcol + 1;
804: h->bufcol = 0;
805: h->flags &= ~HTML_BUFFER;
806: }
807:
1.196 schwarze 808: /*
809: * If something was printed on the current output line, end it.
1.197 schwarze 810: * Not to be called right after print_indent().
1.196 schwarze 811: */
812: static void
1.197 schwarze 813: print_endline(struct html *h)
1.196 schwarze 814: {
1.197 schwarze 815: if (h->col == 0)
1.196 schwarze 816: return;
817:
1.197 schwarze 818: if (h->bufcol) {
819: putchar(' ');
820: fwrite(h->buf, h->bufcol, 1, stdout);
821: h->bufcol = 0;
822: }
1.196 schwarze 823: putchar('\n');
1.197 schwarze 824: h->col = 0;
825: h->flags |= HTML_NOSPACE;
826: h->flags &= ~HTML_BUFFER;
827: }
828:
829: /*
830: * Flush the HTML output buffer.
831: * If it is inactive, activate it.
832: */
833: static void
834: print_endword(struct html *h)
835: {
836: if (h->noindent) {
837: print_byte(h, ' ');
838: return;
839: }
840:
841: if ((h->flags & HTML_BUFFER) == 0) {
842: h->col++;
843: h->flags |= HTML_BUFFER;
844: } else if (h->bufcol) {
845: putchar(' ');
846: fwrite(h->buf, h->bufcol, 1, stdout);
847: h->col += h->bufcol + 1;
848: }
849: h->bufcol = 0;
1.196 schwarze 850: }
851:
852: /*
853: * If at the beginning of a new output line,
854: * perform indentation and mark the line as containing output.
855: * Make sure to really produce some output right afterwards,
856: * but do not use print_otag() for producing it.
857: */
858: static void
1.197 schwarze 859: print_indent(struct html *h)
1.196 schwarze 860: {
1.197 schwarze 861: size_t i;
1.196 schwarze 862:
1.197 schwarze 863: if (h->col)
1.196 schwarze 864: return;
865:
1.197 schwarze 866: if (h->noindent == 0) {
867: h->col = h->indent * 2;
868: for (i = 0; i < h->col; i++)
1.196 schwarze 869: putchar(' ');
1.197 schwarze 870: }
871: h->flags &= ~HTML_NOSPACE;
872: }
873:
874: /*
875: * Print or buffer some characters
876: * depending on the current HTML output buffer state.
877: */
878: static void
879: print_word(struct html *h, const char *cp)
880: {
881: while (*cp != '\0')
882: print_byte(h, *cp++);
1.196 schwarze 883: }
1.194 schwarze 884:
885: /*
886: * Calculate the scaling unit passed in a `-width' argument. This uses
887: * either a native scaling unit (e.g., 1i, 2m) or the string length of
888: * the value.
889: */
890: static void
891: a2width(const char *p, struct roffsu *su)
892: {
893: if (a2roffsu(p, su, SCALE_MAX) < 2) {
894: su->unit = SCALE_EN;
895: su->scale = html_strlen(p);
896: } else if (su->scale < 0.0)
897: su->scale = 0.0;
1.68 kristaps 898: }
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